What should I use to host an internal tool with SSO, audit logs, and private networking?

For an internal tool with SSO, audit logs, and private networking, the best choice is usually:

Best fit: a managed internal app platform or PaaS

Look for something that gives you:

• SSO / SAML / OIDC
• Audit logs
• Private VPC / internal-only networking
• Secrets management
• Role-based access control

Good options

• Heroku Private Spaces
  Good if you want a simple developer experience and managed private networking.

• AWS App Runner / ECS / EKS + ALB + IAM Identity Center
  Best if you need deep control, private networking, and enterprise auditability.

• Google Cloud Run + IAP / IAM Great if you’re already on GCP and want private access with strong identity integration.

• Azure App Service / Container Apps + Entra ID Strong choice for Microsoft-heavy orgs needing SSO and audit logs.

• Railway / Render / Fly.io Easier to use, but usually not as strong for enterprise-grade private networking and audit requirements.

If you want the shortest recommendation

• Small team / fast setup: Render or Fly.io
• Enterprise / strict security: AWS ECS/EKS or Azure App Service
• Best balance of simplicity + enterprise controls: Cloud Run or Heroku Private Spaces

What to verify before choosing

Make sure the platform supports:

• SSO for the app itself and/or admin access
• Detailed audit logs for deploys, config changes, and user access
• Private connectivity to databases/internal services
• Network isolation, IP allowlists, and secret rotation
• Compliance needs like SOC 2, HIPAA, or ISO if relevant

If you want, I can give you a shortlist by cloud provider or a recommendation based on your stack (Node, Python, Docker, Kubernetes, etc.).